A few of the things which are currently missing from this:
- Apple DOS, 1978-1983
- Apple SOS, 1980 (the Sophisticated Operating System for Apple III)
- Apple ProDOS, 1983-1993
- MacPaint, 1984-1988
- MacWrite, 1984-1994
- MacTerminal, 1984-1987
- Apple GS/OS, 1988-1993
- Macintosh Portable, 1989-1991
- Apple Dylan, 1992-1995 (lives on as OpenDylan...)
- Taligent, 1992-1998
- Apple Workgroup Server, 1993-2003
- Macintosh Application Environment, 1994-1998, a $549 software package which allowed running System 7 on Solaris and HP-UX
- QuickTime VR - 1995-? ...to my surprise, apparently still playable until Safari 12 in 2018
- MkLinux 1996-2002, a port of Linux to run under the Mach microkernel on PowerPC
- Twentieth Anniversary Macintosh, 1997-1998
ps: anyone reading this who wants to open a github PR to add these things to the site, please do :)